/*******************************************************************************
 * Copyright 2011 See AUTHORS file.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/

package com.badlogic.gdx.utils;

import com.badlogic.gdx.Gdx;

/** @author xoppa */
public class PerformanceCounters {
	private final static float nano2seconds = 1f / 1000000000.0f;
	
	private long lastTick = 0L;
	public final Array<PerformanceCounter> counters = new Array<PerformanceCounter>();
	
	public PerformanceCounter add(final String name, final int windowSize) {
		PerformanceCounter result = new PerformanceCounter(name, windowSize);
		counters.add(result);
		return result;
	}
	
	public PerformanceCounter add(final String name) {
		PerformanceCounter result = new PerformanceCounter(name);
		counters.add(result);
		return result;
	}
	
	public void tick() {
		final long t = System.nanoTime();
		if (lastTick > 0L)
			tick((t - lastTick) * nano2seconds);
		lastTick = t;
	}
	
	public void tick(final float deltaTime) {
		for (int i = 0; i < counters.size; i++)
			counters.get(i).tick(deltaTime);
	}
	
	public StringBuilder toString(final StringBuilder sb) {
		sb.setLength(0);
		for (int i = 0; i < counters.size; i++) {
			if (i != 0)
				sb.append("; ");
			counters.get(i).toString(sb);
		}
		return sb;
	}
}
